发布时间:2025-01-20 02:34:09
钢筋: (300*4/1000)+(1.5*4/1000)=3.6吨
混凝土:(300*4*1.2/10000米)+(1.5*4/10000米)=3.84吨
(300*4+1.5*4)*25kg/㎡=30.0吨
石头:30吨
沙子: 7.5 吨
有一个高音单元和两个低音单元的前置音响挂墙上会不会影响音响效果啊
2025-01-20 02:34:09 2025-01-20 02:34:09 2025-01-20 02:34:09 2025-01-20 02:34:09 2025-01-20 02:34:09轻钢龙骨石膏板吊顶 准备做一个凹进去的圆的造型 谁知道怎么做 万分感谢
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